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Autoimmune disease that causes muscle weakness. Hemi-paralysis, muscle weakness, 1 in 20,000. N/A. Amyotrophic lateral sclerosis (ALS) AKA Lou Gehrig’s Disease; gradual degeneration of motor neurons. Muscle impairment, atrophy, weakness, and eventually paralysis. 2 in 100,000. 4,000. ................
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